Question about 1994 Toyota 4Runner

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Water leakiong and over heating

The 4 runner over heated and has water leaking from behind thermostat we repalced therostat a few monthys ago wwater pump seems to be ok not sure what eles to look for

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  • Toyota Ed May 11, 2010

    Could you give me a bit more information? Is coolant leaking from behind the thermostat again? Or, do you have other issues.



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Check where your tempature sensor goes into the mafold. It could just need to be re taped, but pull it and check for rust and slime. also everything that goes into the manifold could be a potential hazard. look for any type of tell tale signs, like slime, scale or corosion.


Posted on Nov 07, 2008


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My 1999 dodge caravan is still overheating. I have already replaced the thermostat and the water pump, also there is no heat. please help me someone!

Hi there.
Well you can either have a problem with either radiator outer {dust/dirt in outer core of radiator or clogged up inside were water goes, or soft hoses,blowen head gasket plus a few others ,but first go to garage to were you blow up your tyres and use the air hose and blow out the radiator core where the air goes in, 2 drain out radiator water and then refill with water at 1 ltr at a time and then check your info car book and find how much water the radiator takes ,if it dosent take all the ltrs then the radiator is blocked inside.
if engine runs rough missing etc then get your Head gasket checked out.
When you say no heat is that with heat on gauge or no heat from heater, as it could be heater blockage same as radiator core. So let me know how you get on.

Feb 16, 2015 | 1999 Dodge Caravan

1 Answer

Temp gauge keeps rising like its going to run hot. No heat just cold air......had radiator flushed about a month ago

No heat is meaning the coolant isn't circulating, so it could be a few things.
  1. Thermostat stuck closed (Most Likely)
  2. Water Pump leaking
  3. Clogged Heater Core
  4. Intake Gasket Leaking Internal or External
  5. Head Gasket/Gaskets leaking external .. If its internal there would be big piles of white milky smoke

Feb 03, 2012 | Pontiac Grand Prix Cars & Trucks

2 Answers

My infiniti q45 is over heating and wont hold coolint

Sounds like the thermostat is stuck closed...( did it overheat quickly?)..Where the top or upper radiator hose connects to the engine is where the thermostat is (usually) located.. it may have its own housing also.. but - coolant flows through this from the you can trace the flow and find it.. make sure you get a new gasket and clean all the mating/gasket surfaces
1997 Infiniti Q45 Service Repair Manual Software

Sep 10, 2017 | 1997 Infiniti.5 Q45

2 Answers

Toyota 4-runner heat will not blow hot air. blower works and air conditioning works

Thermostat stuck open,heater core clog, those are the most common causes for no heat, sometimes a leak can create an air pocket, so also check for leaks.

Dec 26, 2010 | Toyota 4Runner Cars & Trucks

1 Answer

Over heating! How can I tell if I need a therostat?

Remove the thermostat from the engine. Look on the thermostat and there should be a temperature stamped on it. Go to the kitchen and put thermostat in a pan with water make sure the thermostat is covered with water. Turn the stove on and watch the thermostat opening before the operating temperature stamped. on the thermostat. Most cars have a 195 degree thermostat. If it opens before the water boils, it should be alright. If not change the thermostat.

Aug 30, 2010 | Mitsubishi 3000GT Cars & Trucks

2 Answers

1994 Honda Civic LX\overheating within 2 mile drive

Remove and raise upper hose at thermostat end and remove lower rad hose.
Fill rad with a hose and watch for flow from bottom rad hose and/ or bottom rad hose connecton.......water should fall though rad easily.
Honda rads are cheap.....any restriction....replace rad.

Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose.
Flush good.

Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.

Stop leak can plug everything.

Also.......not likely causing over heating....but your mileage,if you do not know if the timing belt has been changed.....CHANGE IT NOW!
Water pump is optional at this mileage.

Aug 23, 2009 | 1998 Honda Civic

3 Answers

1994 camaro, no heat, overheating.

replace the thermostat. it's the only way to rule it out.

hope this helped
please rate well

Mar 04, 2009 | 1994 Chevrolet Camaro

1 Answer

Thermostat or not?

the coolant lose is possibly causing the no heat problem. the lack of enough coolant to fill the heater core can cause it not to heat the car up. you need to find the leak. what engine you have????

Jan 03, 2009 | 2000 Chrysler Cirrus

1 Answer

No heat

Some of your hoses may be clogged up. I suggest having your radiator flushed and your thermostat changed. The thermostat causes more or less water to flow according to water temperature. This is what keeps your engine at a good temperature.

Dec 23, 2008 | 1992 GMC Sierra

4 Answers

2003 Nissan Sentra Problem overheating and heater doesn't work.

does the car overheat at idle or travelling down the road? if the thermostat was not changed, thats first step. checking it is replacing it. possibly air-bound. then i would suspect a headgasket problem.

Sep 30, 2008 | 2003 Nissan Sentra

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